Скачать или смотреть First Unique Character in a String | LeetCode DSA Problem Explained | Coding (Java, Python, C++)

In this video, we solve the classic “First Unique Character in a String” problem — a frequently asked DSA / Coding Interview Question in top tech companies like Google, Amazon, Microsoft, and Meta.

We’ll go step by step to understand the logic, optimize the solution, and write clean code in Java, Python, and C++.

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✅ Key Highlights:
• 🔍 Problem Understanding with real-life analogy
• ⚡ Brute Force vs Optimized Approach using HashMap / Frequency Array
• 📊 Time & Space Complexity Analysis
• 💻 Code walkthrough in Java, Python, and C++
• 🏆 DSA Interview Tip: How to tackle String & Hashing problems
• 📌 Part of Top-Ranked DSA Problems Playlist (LeetCode / FAANG Prep)

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Problem Statement:
Given a string s, return the index of the first non-repeating character. If it doesn’t exist, return -1.

🔗 LeetCode Link: [Insert link here]
🎯 DSA Playlist: [Insert playlist link]

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💬 Ask your doubts in the comments — we’ll help you out!
🔔 Don’t forget to subscribe for more DSA + Algorithms tutorials to crack FAANG & other top tech companies. #coding #dsa #leetcode